It all depends on what you are going to do with it. It's not a pound on it work bench, and it's not a true mobile base. When we moved a couple of years ago, I could not take my heavy duty shop with me. So I took a hard look at what I though I would be doing over the next 5+ years and retooled. My answer was was remodeling & handling sheet goods, lots of sheet goods. So I bought the TS55 REQ + an MFT3 with all the standards options, plus 8 dogs and 4 festool clamps. It's been perfect for what I needed. I've adapted all my other power tools to use a short power cord plug, and a regular 10' 1.25" hose on a 5hp vacuum. It works. Rebuilt lots of cabinets, book cases, and closet systems since.
If I keep doing this type of custom cabinetry with sheet goods, I'll start to broaden my tool set with other Festool items as this set of tools are perfect for doing 32mm style Euro Cabinets. If I start to do more rough carpentry, I may build a set of Ron Paulk work benches, or build a massive workbench if I decide to do pieces that will appear in Fine Woodworking.
It really depends on what you will be doing.
As a hint, still on my wish list is a CT26 dust extractor. The hole rail LR32 base place, and sidestops arrived for Christmas.