8 RC on the Praetor E still means -1 on a FA burst without strength-assisted RC. Well, unless you're breaking up your bursts into short and long, which, honestly is the best way to do things. But still, the +1DV -1AP of an assault rifle is worth losing two dice in most cases.
So, I think that it's pretty much clear that the best pistol is an Ares Alpha.
You're almost always better off doing a short and long burst than a full burst. As for the DV, it does depend if you're living in a SnS world or not. If you are, the deeper clip and net -2 concealability difference of the Praetor makes it better than the Alpha unless you actually plan on using the grenade launcher.
If you can manage a gyromounted cyberlimb, the various innate HV weapons are the best SnS spammers. The HVBR works even if you aren't a SnS spammer and technically one-handable as well if you use that optional rule (which I assume is the case).
You can also make the Alpha quite concealable. Lined coat, chameleon coating and shortened barrel gives people a net -1 to spot it and at worst +3 when patting you down (depending on how your GM does the math). With a decent enough palming check, you too can put off Highlanderesque "where did he hide that?" shenanigans.