Welcome! Take your time with mods, this is suposed to be fun. Ask lots of questons, there are many others who have probally done what you are planning/thinking about and they can tell you if the result is worth it before you spend your money. There are alot of "free" mods that you can do to increase HP too so you don't have to spend a bundle to have fun.
Jeff
2006 Superior Blue Trailblazer SS AWD, Stock as a rock
Sold: 2002 GMC Sportside Denali front end with a 2002 LS1, FLT level 5, Yank 2600, Trick Turbo, T76, Nelson intercooler, 60LB injectors, Warbro fuel pump, Eaton locker, Magnaflow, 3.42, Nelson Performance Tuning (speed density).
Sold: 1981 GMC LB RC 1500 2002 4.8L 4L60E 12 bolt 3.73 Richmond Lock Right AC PS Nelson Performance tuning