Need some advice

[daplatapus]

Ok, so I have a Vertex IN-250 that I've been having issues with. If power is interrupted the pump won't restart on it's own. After pulling it all apart I realized the back end of the pinwheel shaft is swollen and it's probably having a hard time getting going again.
Well it turns out the LFS I bought it from (maybe a year ago, less than 2 for sure) neglected to tell me that this particular model had been discontinued and I can no longer get parts for it. I guess getting old stock off his shelf was more important. Anyway....

I need to replace the pump on it. I've been told by the Vertex rep that either the Bubble Blaster 2000 or 3000 will fit on it or the Sedra 5000. There might be some minor mods depending on who you talk to. I was also looking at the Reef Octopus RODC3500 thinking if the pump is a bit big, I can dial it down. I've read on RC guys with pumps a bit big were fighting micro bubbles and overflowing skimmers.

So, anyone have any experience with any of the above pumps or similar skimmers?