If you plan on a stand alone tub setup right now you can purchase a UTH (ulttratherm are the best, sturdy and long lasting) and T-Stat at reptile basicshttp://www.reptilebasics.com/, also check out their racks, Rich is top notch , Boaphile might have a good product however the lead time and lack of customer service is a big issue.
Another great rack manufacturer with short lead time Chris at C-Serpents http://cserpents.com/C_Serpents_Hot_...K_SYSTEMS.html
Also check out Animal Plastics for PVC cages http://www.apcages.com/home/