I bought my T11 from D & M tools in Twickenham last month. They have (or had) an offer of a 1/4inch collet thrown in, at around £225 (incl. VAT) around 25-30 cheaper than the DeWalt, which anyway doesn't have the through-plate height adjustment. I don't know if it's still available, but I'm pleased.
The through plate height adjuster looks well thought out. I can't recommend the quick release system, as I think it's poor value, but I did have the plate drilled for them and have partially fitted them. The bolts and sleeves act as a really positive locator for the router, meaning the main mounting bolts align perfectly and very easily. It's little extra effort to do up the bolts, but I can see if you use Trend's table (which I guess is intended for site work), there may be a setup time saving.
If you do get one, you can get away with 17mm on the adjuster hole (not the 20mm they suggest), because the supplied long socket/handle has an o.d. of only 16.5mm. I got my aluminium plate drilled and countersunk locally, and gave the firm 1:1 drawings based on the drilling dimensions Trend supply in the router manual - everything fits perfectly, and you can change the cutters from the top, when fully raised the collet is roughly level with the table surface.
I also found the collet nut as a spare (Miles), about £5 cheaper than as an 'accessory', so have a second one to avoid messing about when switching shank sizes (I can only just get them to unclip by hand - a dowel is probably the answer, but I'd hate to bend those thin collet segments).
I have to 'fess up though: my T11's not up and running here yet, as I'm still doing mods to the table etc., so I can't speak to how well it actually works! It's a bit frustrating, (but domestic politics are involved too).
HTH, a bit at least...