A stock HT2-TL is alot of speaker for the money. IMO, it is the best buy in the Salk line.
I've been reading this board for years, and it seems most people get the stock internal components (no upgraded caps etc), and I've yet to see maybe one post that said there is a night and day difference between the stock components.
If it were me, I'd get the HT2-TL in a standard finish, and standard components, and call it a day if money is an issue.
Edit to say I own both stock HT2-TL and Songtowers. "Super charging" the Songtowers wouldn't give them the bottom end that the HT2-TL has and so my perspective is based on that observation. Both are great speakers. I have the Songtowers hooked up to my computer, and my HT2-TL's hooked up to my main tv.