I wouldn't ditch those E60's for a GW8-L, if I were you, Mo. The GW8 is stripped down in quite a few important aspects (one of the main ones is there is no tempo HOLD when calling up another style while one is playing) and honestly, I don't think the sound quality is quite there...
If I were you, I'd only sell ONE of the E60's (and try to sell it locally, just in case you get a breakdown and need to borrow a backup!) and try the JunoDi with it, or just sell one E60, save a bit and get the M50. The thought of selling a $1800+ (new) arranger to get a $1000 arranger just doesn't cut it, for me. You need to take a VERY careful look at the GW-8, I think. Personally, given a choice, I'd pick the E60 every time. Just the touchscreen alone is worth the price of admission (navigation on the GW-8 is MUCH more menu after menu, old school.
There are translations of many of the GW8 styles for E60 up at Roland-arranger.com. Have you tried those yet? Admittedly, the E60 is a bit lighter in the Latin percussion area, but it is no slouch, for all that!
I just think you need to back down from this hair trigger GAS (Gear Acquisition Syndrome), and research these options a bit more carefully. As I stated earlier, trading away stuff to get something new that doesn't do the job as good as what you have now makes little sense...
Newer isn't ALWAYS better...