You could consider a Zodiac MKII Futura. It's available with HD (aluminium floor) or H2P (high-pressure air floor). The aluminium floor version is rated for 20-50hp or the air-floor, 10-30hp. Not cheap though.
The MKIIC uses a standard shaft outboard, where the MKII and MKIII (4.7m) require a long-shaft outboard as the tubes are oversized, deeper transom, etc.
I still have a mid-80s Zodiac MKIIC GT and it can be transported in 2 bags. The floor-boards are heavy, and this bag is isn't for the faint hearted. Fine if you're building the boat at a slipway and launching for the day. I used to run it with a Yammie 25hp. That was right on my weight limit and is easier to handle with 2 people, although I've assembled the boat lots of time on my own. Will fit in an estate car with the rear seats folded down, but ideally you would be better off with a box-trailer, or better still a bunk-trailer so you can arrive and launch.
Prices and spec here: http://www.zodiac-boats.co.uk/downlo...202011.doc.pdf