Dont rush into buying anything.Iwould buy a computor first.Does not have to cost 1000.00 $ Just make sure it does nitrox.You can buy a computor for undr 300 $ that will be just fine. Then a reg.Buy the best reg you can you can afford.All the big names sell a good reg.Your bc, you should try a bunch of then from back inflation to jacket style to a back plate.I like back inflation.but it is up to you .I use a Diverite transpack and love it.If you are not going to do alot of local diving I would hold off on the tanks.These are just my opinions.Good luck.