for the most part, the reduced speed from hrps is relatively negligible. cobras hit what? 420ish (hurr hurr)? with hrps that may drop to 415ish, maybe 410. either way, it'll still outspeed everything but clippers and lightweight cobras.
edit: 420 with full hrps and military armor. 427 with a shield, scbs, a few hrps, and military. the 7 extra m/s really won't mean much since you outspeed just about everything that isn't a cobra, clipper or imp eagle.
basically, just cram as much crap into your ship as you can. scbs, hrps, bulkheads, etc. the tankier it is, the less likely you are to die.