I prefer my slider for dado and rabbet operations, I use a short crosscut fence for dado's, it works great and is very safe. I'd also want a longer slider if you can, nothing beats loading up a sheetgood and cutting it to specs in a matter of minutes. Given your shop dimensions, I see no problem with an 8' slider. I use a Forrest dado on my Felder and it cuts wonderful. I'd also recemmond an outrigger with your purchase, I know its an option on the Hammer saws, but its really nice to have for sheetgoods, they come off easily giving the machine a pretty small footprint when you dont use it. The only thing I dont like about my slider in comparison to the PM2000 I used to own, is ripping solid stock, I dont get as accurate of rips with my slider as my Powermatic. It may be operator error as ripping on the right side of the saw blade is still a little awkward for me on a slider. The "leg" that sticks out for the longer slider does get in ones way when ripping.
I'd highly recemmond giving the Hammer guys a call, I deal with Fergus on the west coast, nothing but super service from them.
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