I think the Ideos, even though slightly overpriced in Pakistan (as others have noted), is still the best value you can get for your money at the moment. It's true that Nokia handsets tend to have better resale values, but honestly speaking I have seen sets from other companies perform just as well and just as long as Nokia.
Huawei is not a small company and Ideos should not be pitted with unbranded Chinese mobiles, which, I fear, is how many people will be looking at the handset in the open market. You will find a good resale if you find a person who knows the value of owning an android handset.
As far as the Blade is concerned, it runs on Android 2.1. Given the performance boost android 2.2 brings to the table, you will definitely see Ideos running much faster than Blade. That said the screen sported by the Blade is definitely its trump card, although I doubt you will find its price going down in a couple of months. You will probably have to get it for its listed price of GBP 99 (roughly Rs13,300). You also don't get any warranty in Pakistan, which might adversely affect its resale.
Huawei vs Zte: both are big Chinese companies whose handsets should be good quality that will easily last you as long as mobile handsets made by other, more well-known, companies.
Personally I am getting a T-Mobile g2 in January. But the Ideos has me so excited that I might just get it for a month to try out a "budget" android to see how it works with froyo (android 2.2).