If your looking for a first gun to start with try Frank at Velocity Arms here on the forums. Products are solid, prices are great and the customer service is excellent. My team mate picked up the G&G M4A1 from Frank and loves it... shoots fast and solid with excellent groupings out of the box. Lower receiver is clear but in all honesty your going to paint it anyway so no biggie. He also carries the new M4A1 with the blow back on it as well... great place to start for a first gun.
And for the record... I'll put my TM 5.1 Hi Cappa up against that pea shooter Glock any day... lol.
We are not the masks we wear, .... But when we don them we become them!