Hey, Agree with Asco I’ve been reefing just over a year first tank is 180l 100cmx80x80. Do I love it ? Yes, what I’ve learnt - size is never enough, I didn’t start with a sump, wish I had.. to begin with it didn’t bother me, but as you get into it more and more you realise how important it is when keeping harder corals, not to mention visually having skimmers etc hanging on the tank.
Red Sea tanks imo are great, if commitment isn’t an issue personally I would start there and start with a good setup. For me the first 5-6 months of getting an established tank where the hardest, eager to fill it, algae issues etc etc once established there not too bad to maintain obviously depending on what you keep ! Just remember to take your time don’t overstock and you’ll be fine ..