For 2ft, you can choose a 1/10 hp chiller. There are several brands out there in the market, Hailea,Resun,Teco,Artica.
Hailea and Resun 's inbuild thermostat is not very accurate though, to overcome it you'll need to DIY an external thermostat to more accurate reading.
For filter, most people will recommend Eheim as they have spare parts readily available.
What i did for mine is to get a inlet > prefilter > canister > chiller > outlet > tank