I'm 220 total volume, I'm looking for a skimmer that I can still grow with up to say 300 total volume. I looked at the 170s and heard that can be a pain to tune. The quality of vertex seems like you get what you pay for. Im not opposed to spending for good stuff, my tunze 6105s are awesome for example. But I'm nervous about coughing up $900 on a skimmer. I'm looking at new vs used based on the cost of red dragon parts. My other option was a super reef octopus 3000.