Yup, SVC.com currently has the Thermalright SLK-900A for $19.99. Why do I know this? Ask my credit card, LOL. Anyways, I never considered buying this at regular prices, but with this sale price I jumped on it like a... nevermind, this is a family forum.
I've been happy with my Thermalright ALX-800 as well (just ordered SLK-900A today, so don't have it yet). I think the SVC.com price is around $16. Note that these prices are WITHOUT fan.
I was less happy with my Thermalright SLK-800A. Why? I paid $45 for it at the time, and I expected more from it. Sure, it worked REALLY well, but was also REALLY expensive. I guess I like budget stuff that works well more than expensive stuff that works well. Just consulting the list of CPUs I have... mobile Barton, mobile Celeron, P4 2.4A... all nice budget performers, heh.
I do like the Zalman CNPS-7000A-AlCu units. Fairly priced, cools decent and is quiet.
I like the budget Coolermaster units, such as the XDream and the Aero Lite. Those run about $15+ (or on sale for $11) and are a good budget solution.
I'd better put on my asbestos underwear when I say that I don't have a problem with Thermaltake products (besides their fugly cases and color choices, LOL). The company isn't afraid to innovate for the general consumer and offers reasonably priced products that are reasonable performers. Take, for instance, the Silent Boost HSF. Soon as someone mentions it, many people will jump all over the thread saying such and such Thermalright heatsink with a Panaflo undervolted with a fan speed controller will outperform the Silent Boost while being more quiet. Ya know, they are 100% correct, however the information would probably be useless to the person asking because most people probably won't notice the noise or performance difference while they will definately notice the cost difference between the $28 Silent Boost and the $35 heatsink + $7 fan + $7 speed controller. Whenever people around here ask for information on something being "the best for $XXX amount of money" the answer they get is often "the best, period." Useless information if they can't/won't spend that amount of money.