I dont do much hand held routing so cant comment on the best router for that but I have used the big Triton in a table for a while and can thouroughly recommend it.
The plus points are;
A large base plate opening.
Rack and pinion height adjustment with fine adjuster (so no need for Router Raisers etc).
Cutter change from above the table, you fully plunge the router (using the rack and pinion) and the collet nut appears above the table surface (remember it is upside down in the table) the spindle automatically locks, you then just need the spanner to fit/remove the cutter.
You can easily remove one of the plunge return springs to reduce the tension when upside down.
Minus points, havent really found any.
It has all the usual soft start, variable speed, dust control etc. I think it comes with half and quarter inch collets and I think 8mm is also available.
For hand held use you can easily release the rack and pinion and use it as a normal plunge router. Only real disadvantage is the fence which is not as good as several on the market (IMHO).
Hope this helps - Martin.