Having a peninsula 215 myself, I will say up front this is difficult to pull off and you will likely find yourself in a compromise where either you compromise on inhabitants on the far end because flow will be insufficient or you will have to compromise on having powerheads and the aesthetics of cables at the far end. I ended up placing 2 6055's in nano stream rocks on the far end and living with the cables as it just wasn't working well any other way.
Your lowest maintenance option will be the 6150's, since they have a lot of cooling/ self cleaning and they work on magnetic levitation, the build up of calcium is next to nothing and the intake gets cleaned once a day by a reverse rotation that lasts about 30 seconds. These are also virtually dead silent, sub 42db, even in the quietest rooms the ambient noise will generally be more than the pump noise. For compact size and all things considered the 6105s are a good bet, 52db, still pretty quiet, they need a tear down and cleaning every 3-6 months depending on KH and Ca levels. In both cases I suspect you will need some supplementation on the far end to not limit yourself. They will reach the length of the tank and return but the flow is down to softie/mushroom levels after 5ft. Also, both come with magnets for 1/2" so for thicker glass factor on stronger upgraded magnets.
How wide is that pane under the overflow? If that is about 6" wide I would use 6150's and mount them to that pane aiming straight across and it should work very well, if it is only about 4" or less I would use 6105s.
I think you have a good plan otherwise, do keep in mind the 6055s come standard with a 3 meter cable, so that is a limitation, the bigger pumps have 5m and it is possible to custom order a 5m cable 6055, that is what I ended up doing for mine as it gave me more room to run the cable in a way I could hide most of it. I seem to recall it is a $10 upcharge and takes about 3 weeks.
Yes, you would want a master controller of some sort to set up a more advanced pattern, an Apex or a 7000 for example.
I think 2 6150 and 2 6055 will likely be enough. You would only need whatever accessories your apex needs to run the pumps and they will work without the connection so that is not urgent, it just lets you coordinate the flow pattern. The 6055s would need to be special ordered, 6150s have been in limited supply pretty much since they came out so if you find them I would get them where you can.
Where did you order the 5m cable 6055's? They are not a stock item anywhere and most dealers don't know this is an option.
Thank you! We expect more 6150's soon. For the first year we had a lot of production hurdles with the drive unit, it has two opposed magnets inside which I am sure anyone who has played with magnets, especially very strong ones, can understand that assembling something that way is not easy. We solved this problem but already very behind with a lot of backorders we are still catching up. I do expect to get more in the next week or so and existing backorders should be filled soon.
Yes.