My 17m Vulture
http://coriolis.io/outfit/vulture/0...4a5e010000.Iw19kA==.Aw19kA==?bn=Vulture 16.7M
Perhaps not the best build ever, but for me works well (at least against NPC) and re-buy cost is not that expensive.
You can downgrade Life Support and Scanners to D grade and with some priority settings you can equip even A grade Thrusters. Since I didn't like how Military Grade Hull behaves with B grade thrusters I reverted back to Light Alloy. With your budget (in Li Y space) you can buy Military Grade hull and get A grade thrusters.
90% money I made so far was from BH.
Beside this ship, I own Phyton, but it is still not a great fun to fly it (still requires some upgrades). As others noted, any ship after Vulture (with exception of Eagle) will feel sluggish....
FAS:
Yesterday I almost got kicked by FAS in Hazardous RES and was surprised how agile this ship was. Usually it isn't hard to out-maneuver other ship when you fly Vulture, but yesterday I was kind of slow and had hard time destroying that FAS...
I have rank for FAS, but didn't try it yet as I don't have spare money. I love my reliable Vulture so much that there is no chance that I will sell it. I would rather lose that Python than lose ship in which I earned so much BH credits.
If you don't care about low cargo space, don't mind short jump range and you don't mind playing with modules priorities, Vulture will be wise investment.