The ones you linked to are too small to carve a top. I've been using 1" #7 bent gouge on a violin I'm making:
http://www.leevalley.com/wood/page.aspx?c=...cat=1,130,43701
The bent feature keeps my knuckles from touching the wood while carving. If you want to add the access curve like on the treble horn of a PRS, I think a rasp would be better. For the re-curve around the edge, where it goes down then back up into the main arching, a scraper might work really well, that's what I used on my violin.
I think a spokeshave would be difficult to use, not the right shape of work for the tool.
Also, read up on 'scary sharp' for getting your gouges deadly sharp.
Personally, I found these to be very helpful, too:
http://www.leevalley.com/wood/page.aspx?c=...680&cat=1,41182