yeah, don't get a HIGH end marker right out of the gate.
You could look at a PMR for sure, very upgradable and you can build them to be beasts. And if you are looking to buy used, take a look at shockers, they are very nice for how low their prices are ($250 for an SFT with upgrades). But if you are looking for a new gun, take a look at: PMR, ION XE, epiphany, or even an SLG with a few upgrades (IMO an SLG with a new trigger, feedneck, barrel, ASA, and maybe a tadao can match most highend markers in terms of performance. I have one and LOVE IT) And if you really want a higher end gun without high end prices, you can take a look at a DM5, PM6, or maybe a PM7.