the most interesting model for you that i saw at my dealer this morning is the Brother SB3129.
it has a decent space to the right of the needle ... 7-1/4", which is the same as the PC420PRW.
the extension table also comes with it.
my dealer said the SB3129 comes with a 1/4" foot but i don't see that listed when i check the brother website.
he said brother only offers the SB3129 model through dealers.
i sure couldn't find it anywhere online.
given that you can get the PC420PRW for as little as $399 through amazon, i'd say that's the better buy.
even after you buy the extension table and 1/4" foot you will not have spent as much as for the SB3129.
http://www.brother-usa.com/HomeSewin...C420PRW,SB3129
the deciding difference would be whether there's a brother dealer near you, what they charge for each, what sort of deal you'd get on personal instruction, classes, service, etc.
i have a friend who owns a juki and she's in love with it.
whether you settle on a brother, janome or juki i expect you will be happy for a long time.