Apogee would be my personal recommendation, though a Falcon or Eagle will be cheaper to operate, and are both still quite good. I would not recommend a Dominator - I find them to be tricky to fly and heavily reliant on support.
That said, if you do get a Falcon or Eagle, I'd strongly suggest not using the default variants; in particular, you want burst PD covering your engines - they'll reliably shoot down salamander missiles - and you'll want a mix of kinetic & HE weapons in the medium slots - I'd suggest one heavy mauler for the HE, and one (or two for the Eagle) heavy needlers, but you can substitute other weapons without too much trouble. For the medium energy turrets, graviton beams are basically the only option; these mid-tech ships don't have the dissipation to support heavier energy armaments.
For the Apogee, I frequently ignore the missile slots; there are a lot of variants that will work well, though. For example, you might use heavy blasters in the turrets as primary armament, with an HIL for long-range fighter/frigate sniping. Or you might use a plasma cannon, backed up by phase beams for anti-fighter work. Or you could use an Autopulse Laser with a MIRV launcher or a pair of antimatter blasters for breaking armor. Or... etc. One thing to be sure of, though: you need to have armament that can take out fighters, otherwise the first broadsword wing you encounter will kill you. Fortunately, even heavy blasters works reasonably well here, as long as you have enough CR / gunnery skill to make them hit.
Always put dedicated targeting core on cruisers (and capital ships if you decide to get one); the only exception to this rule is if you've got enough points in tech to install integrated targeting unit instead. ...Or if it's a carrier or other utility ship and its weapon ranges don't really matter.
If you're going for an Apogee, you'll want at least 70k credits just to make sure you can afford hull (42k) + weapons(10k+ depending on what you want - cheapest effective armament is 2x heavy blaster 2x burst pd - put remaining points in unstable injector, vents, and capacitors) + crew (9k for regulars) + supplies (maybe another 10k here just to be sure); the first game I played with CR, I bought one when I couldn't quite afford it, and things went... bad.
Falcon & Eagle are both a bit cheaper, but you can figure those out yourself I'm sure.