you could get a FI Q DVC 2 ohm .. wire it in series for a 4ohm load.. It would probably be your best choice for SGL on a budget.. but without that we could give limitless brands that might cost more than you'd want to spend .. or in my last case more than my car was worth :P
Problem is we dont do a Q10 currently. As I have had many request for one, I am testing a couple different spider options for them right now to see if I cant reduce some of the geometry issues associated with 10" basket and high excursion drivers. So far things look promisisng. Ill keep beatin on the current version and see if anymore changes need to be made from there. SSD D2 with the copper coil (not an option up on the site yet) is another less expensive great alternative (if you dont mind me spamming my own stuff;) )
.. or in my last case more than my car was worth :P