If you are actually going to cycle to work and don't work half way up a mountain, I would think hard before buying a full suspension bike because they are inevitably pretty heavy and no fun whatsover to ride on-road. For light cross-country, which I think is what you are talking about, many people use hardtails and some are even dispensing with front suspension to save weight and get more precise steering. A hardtail is fine on-road, especially if you can afford a second set of wheels kitted out with road tyres.
For a full suspension, you would be hard put to better the Stumpy, which gets fabulous reviews, although I'm surprised the Kona Four Deluxe (if you can get one), which has one of the new Kona scandium frames, doesn't make your shortlist. I think either of those two bikes, which come from manufacturers with long and illustrious pedigrees in this field, would be much better than the Orbea.
For a hardtail, the Scott Scale range is supposed to be fantastic -- incredibly light and stiff. Konas always score for great handling, and their new Scandium frames are both light and comfortable. The Genesis range seems like top value, especially if a more comfortable (but heavier) frame appeals. I looked into hardtails a lot a few months ago, and these were the bikes that stood out.
It's worth bearing in mind that at the price you are talking about, the hardtails are race bikes for which weight is everything -- most of the components work brilliantly anway -- and they are built for people who on the whole replace their bikes quite often. They are tough when ridden as intended, but fragile when it comes to accidental knocks and bumps -- you can easily ding an expensive lightweight frame with your knee or by banging up too hard against a lamppost, for instance! Come off one, and there is a higher chance of a write-off than with a cheaper, heavier bike.
The same is true of full suspension bikes -- except that there really aren't any cheaper full sussers that are worth buying at all. Below a grand, they are heavy just to look at and constantly need repairing.
This is not to put you off an expensive bike -- they really are a lot better than cheap ones, especially the frame, forks and wheels. Personally, I have never hesitated to spend as much as I could afford and then some because I think riding really great bikes is hugely exhilarating!
Of course, the best and most important thing you can do is ignore all this pontificating and try the bikes out yourself -- one or other will just feel right. Years ago I had narrowed the choice down to a Kona or a Cannondale. I was convinced I would go for the Kona, but when I got on the Cannondale (F600), I just felt completely dialled in, and I had my credit card out within two minutes. Then I had my credit card out again and again for three years because although it is a beautiful bike and a Headshok is the best short-travel suspension unit on the market when it works, it is almost impossible to service and there are very few mechanics who have mastered them. I lost count of the number of times I paid fifty quid to have mine "serviced" at wretched
Evans...
Cheers,
Tom