How would you spend $800 (budget) to improve over the winter (im in Michigan)? There is Golftec with its indoor practice with video and 10 lessons, there are a ton of training devices, there is the gym (to which I already belong and use), there are DVDs (I have Alignment golf already), there is the ability to hit at the range which is heated.
I like Golftec only because I can use the indoor facilities and hit balls whenever I want with video. The lessons I'm not too crazy about, but, I suspect I could improve with them. Its a $775 investment by the way...