My favorites are Dave's shaves or one made by Russ Filbeck:
http://www.ncworkshops.com/products.html
http://www.russfilbeck.net/spokeshave.html
Though there are times when I reach for these:
http://www.woodjoytools.com/
or
http://www.leevalley.com/US/wood/page.aspx?p=49142&cat=1,50230&ap=1 (I've heard plenty of folks get great results out of the inexpensive wooden bodied ones that they also offer for sale)
or these:
http://www.lie-nielsen.com/catalog.php?cat=514 (I like their metal versions better than their new woody)
and to confuse matters further, Clifton makes a special purpose pair, (concave/convex), Terry Gordon, (HNT Gordon, Australia) makes some beautiful spokeshaves that are exceptional for hard/cranky timber, and the Windsor Workshop also has a few offerings from the UK. I'm not a big fan of the Japanese style of spokeshave as they're just not comfortable for me. Any of the new offerings by Kunz and Stanley will just make you angry, though I've heard plenty of folks rehab pre WWII Stanleys with great success, (not my cup of tea).
Sorry for the long list, just wanted you to know about your options.
To make a long story short; I have way too many of these things, but each has its idiosyncrasies that make it excel for certain tasks. I could be humming right along using one of Dave's Shaves, then hit an area where the LN, Woodjoy or LV is better suited, (I've never really focused on why, I'll just keep trying different ones 'til I start getting good shavings and less tear out). It could just be me, (user error), but they're moody little things; like everyone has already mentioned, the sharper the better.
Just an FYI, despite having large handles, you're not supposed to grab 'em fully with your hands and start heaving/cranking away. The 'preferred' grip is pinching right behind or beside the blade w/ only your thumb and pointer finger. Oh, one more tip. Lots of folks cant the blade from one side to the other so on one side you can get a whisper thin shaving and the other can do larger work; that way you don't have to adjust the blade from shaping through finish stages.
One last thing; if you find yourself far down the spokeshave slope, these come in handy!
http://www.leevalley.com/US/wood/page.aspx?p=51504&cat=1,50230&ap=1
Dave