My girlfriend's sister has a Tundra, and we do plan on going to ikea in a few months, so I might buy some other things then. I'm pretty sure I'll like the desk (I too am a fan of simple desks), but if I see one I really like at ikea I might buy it anyway.
One of these days I might buy a sub for my computer again, cuz I definitely miss having one...but I can always stream music to the HT system and use the bigger speakers and sub there
If I had to choose between adding a sub to the HT or to the computer system, the HT system would be my priority.
I'm really liking the PSA subs, and am eager to see an audioholics review of the XS30. Two of those would be awesome.