i personally will be upgrading my light unit as well and probably gonna be grabbing https://www.amazon.ca/MARS-HYDRO-Sunlike-Spectrum-Dimmable/dp/B07NKT2VRD/ref=pd_rhf_gw_p_img_5?_encoding=UTF8&refRID=DCMZKBEJVRVEJBK5CZTF&th=1, it fits in your budget and is decent enough for a 3 by 3 tent, migro has a review of the unit as well, hope it helps man, budget growers for the win, hahaha, its how i roll hahaha
Check out the quantum board lights much more light per dollar!! Spider farmer makes great ones and hlg makes DIY kits but the quantum board lights run pretty cool n pump out 2x the light the power supply puts into it...so a 300 watt driver put out 600 watts worth of light!!! My hlg 260 (3 quantum boards) puts out equal to a 600 watt hps!!! So they save $ n pay for themselves in time and results!!!