I EQ a lot of synths to give it it's place in the spectrum. They often sound weedy when SOLO'd but of course in the mix it either works or it doesn't. I'm not afraid of EQ and compression with most synths (esp when using a lot of them).

Maybe try some sidechained compression on the kick so as to separate things out a bit...?...that, and as suggested tweak a preset that in itself may have been deliberately skewed as bass-heavy...and staying away from headphones?(I myself only use heads for spotting artefacts). Does to my limited ear sound like a room set-up and/or referencing thang here.

I would suggest playing some of your favorite songs through your system (pull the mp3/waves into Sonar) and see if it is "bass heavy".  From other comments to the OP from those of us who've listen to your track it would seem it boils down to your room/speaker set up...since it plays well elsewhere... bass traps and monitor placement help a lot.
 
In the past year I've gotten heavily into equing frequencies of different tracks so they don't compound/interfere with each other. Has helped a lot.  Generally dump low freq. from vocals, guitars, and many other instruments (or at least shelve them) to leave room for the lower instruments...I use a lot of rich low end pieces like DIVA, Damage, Iceni... and they 
 
So I imagine it's a bit of both... room acoustics/monitor placement and oversaturating the low end by additive tracking...
 
Getting some "flat" headphones like KRK's would be a good test... some like me love um as low end is real and not overdone... from there you can begin equing/sidechaining...
 
 
 
 

If you really wonder if your stuff is bass heavy, or whether your hardware synths are not, you can find the correct answer in a minute with an analyser and a reference track or two.
No need to waste time guessing and speculating.