As mentioned above, if you want to use LRMs get the 733P. I'd get the 733C, 733P, and 732 HGNs. I have the HGN-HM, 733C, and 732 and the most fun of the lot is the 733C. The most deadly is the 732 set up as a cheese 3PPC+gauss sniper but they are all very good for me.
I like your 733C loadout, you could try this one with a std engine but with streaks instead of dumb fire. SRMs do too little damage at the moment, and streaks are preferable for their lower weight and CT seeking. When they patch SRMs you can change your build to an XL. XL's in HGN's are fine as they allow you to carry enough firepower.
Here is a std HGN733C build.
http://mwo.smurfy-ne...93fc8eab8d4038e
Here is an XL version of the above with extra speed & DHS.
http://mwo.smurfy-ne...a3789f0e732c60f
For your 732, I wouldn't mix LRMs and SRMs, mixing ranges like that is rarely successful. Another thing is to avoid taking too much armor off the legs as you can use the jumpjets to spread your damage around to your legs.