Try to avoid entry level/just good enough for now gear .. you don't have to get the highest cost stuff, just get good quality, solid, middle of the road gear .. cause you don't want to find yourself a year from now wishing you had a better performing regulator ... was the only gear buying advice I got from my instructor and glad I listened and got my SP G250
BCD? .. better to try some before getting one, While I love my Knighthawk, if I had to do it again, I would go for a Back Plate & Wing ... more flexable system, will grow with you, no matter where your diving interests take you
.. Drysuit? thats quite a big jump from a wetsuit and associated gear, well, as long as your not talking about a $300+ wetsuit (My Akona + boots, hood, gloves $240)
.. and yeah, I did just get a drysuit off of ebay, but only after using my wetsuit for 3 years
Store? ... Larry at ScubaToys, Tobin at SeepSea Supply, Mike at Dive Right In Scuba, Phil Ellis at Dive Sports.com, are all very active here on SB with helpful advice and good deals for members