What oven should I buy, which is appropriate for baking?

Three months ago I moved to a new apartment. In my old apartment with my old oven, my baked goods turned out pretty well. However, since I moved, my baked goods vary from almost-good to throw-it-in-the-garbage instantly. First I thought I had to get used to the new oven, so I made adjustments to the temperature and so on. Still I just get very sad every time. The oven is over 30 years old, so I think I have to conclude; I need a new one.

I looked around on the internet for a while, and I did not really get an idea of how to choose one. A couple of things are important to me:

• It must be appropriate for making pastry
• It will be used a lot (almost every day), so for home-use it will be used pretty intensely
• I can not install a built-in oven; I rent this apartment and may not change anything
• It must be big enough; I have no problem with taking a lot of my space
• Here in the Netherlands combo-ovens, which are an oven and microwave in one, are very popular. I'm not interested in the microwave part, so the quality of the microwave is not essential assuming one is in the machine.

I am willing to spend some money on it because I use the oven every day. (Note: The owner of the building is probably not going to help me pay for it)

When looking around for a new oven, a couple considerations were raised for me:

• The free-standing ovens have different powers. Which power must I have at least? (I have seen variations from 800W to 1500W)
• Prices vary widely, while specifications do not. Are there some brands or types which can be recommended?

I would like to show you the options that I've disregarded, yet I don't even have a clue where to start at all! I am hoping to hear some good advice on how to select an oven to fit this criteria.

-edit- I start doing some more research. And this is one criteria that must be met for me: I want top and bottem heat. However, this is not the case in most ovens I can find, and sometimes it is not specified. Maybe I should conclude that it is not the case then? Does anyone know the influence of only top heat?

Furthermore my research ended in some options. Prices and types vary, but I can not really tell the difference from the specifications. For example, what does the number of WATT says about the specification of the oven?

However, next to my confusions, this are the options I selected to give you an idea about what I am thinking about:

1. http://icecat.it/us/p/delonghi/eo3275/freestanding-cookers-8004399181762-eo-3275-10726854.html

2. http://www.tristar.eu/en/Home_Appliances/Cooking/Ovens/OV-1417/3/3195

Well this is to give you an idea what I am thinking about. I hope to get some feed back about a possible mistake I make with this kind of oven, or what is good about them. If you would compare them, which one to choose? The price is around the same and within my budget. (less then 250-300 euro's is fine, and this is around 150-200 euro's)

Why did I choose these two? The main two reasons:

-They have top and bottom heat

-They have a volume of around 35 liter. I make pretty large plates, especially cakes. I want enough space in my oven, but maybe I am exaggerating and 24 liters really is enough for home use?

I know this are a lot of questions at the same time. Basically I want a good advice, and feedback about buying an oven. I want to know I a forget any criteria that are important. Also I want to know how you can know ffrom specifications what is a good oven. Can you know quality difference from it? Or is the only way read experience from other people and base my opinion on that? If someone can tell me how I know which oven is a good one, you helped me a lot! Thanks a lot!