Hello all, I'm relatively new to Warhammer, having started the hobby around a month ago, as of now I am 0-2-1 and I'm at the point where I want to buy the old codex to help me build my army, but with the new one around the corner supposedly I don't want to waste my money (this hobby is expensive enough already

)
This is my list, recently supplemented by the new starter:
HQ:
1 Company Master Balthasar (Power sword and combi-plasma)
1 Librarian Turmiel
1 Interrogator-Chaplain Seraphicus (quite handy, crozius that gives +2 S and has concussive. other than that, frak and krak grenades, and litanies of the dark angels, which lets me re-roll hits and wounds if I'm facing
CSM.)
Elite:
1x Veteran squad (
SS/
PS,
PM/
PP, Plasma gun and two bolters)
1x Deathwing termy squad (
SB/
PS,
AC/
PF,
SB/
CF, 2
SB/
PF, A.K.A what comes in the set)
Troops:
1x 5 man
tac squad (bolters)
1x 10 man
tac squad (Plasma gun here, plasma cannon there, plasma pistol on the sergeant, plasma-plasma-plasma.)
Fast Attack:
3x ravenwing bikes (twin-linked boltguns as usual, one of them has a plasma gun.)
So far I have a pretty standard list I think, I need some transports that's for sure. A friend has some termies he picked up a while back I might take off his hands(haven't seen them yet, hopefully some of them have
LC's or
SS/
TH)
Thank you all for looking, and hopefully offer me some insight as to what direction I should take my army from here(I.E what to buy).