K You wanted reasonable eco. Reasonable eco is everything in the ~2.8 dpp range ( or better ofc )in my eyes. With your skills oldschool guns are out of range when you want eco ( or you are miner and just shoot 10-20 mobs per day, then nevermind ). You want a dps range for Ambu and medium Trox. So in my eyes ~45-50 dps. And to combine the requirements there is no UL choice in the mentioned priceclass. Only (L). So i gave advice to get an A106 Laseramp for it which is in the "no more than 4kped" priceclass.
A viable alternative is a Dante BLP Amp and use Apis+Dante on them ( provided you have the Apis maxed )