The G-luxe is tippy. Otherwise a great choice, though. The Onyx is heavier and less tippy--you can hang a medium-sized bag on the handles and it won't tip. Both a bit pricey, though.
Does she have a good Craigslist? Or willing to go Ebay? There are some used Maclarens on eBay that won't go over $100.
Or, I haven't used it, but what about a Quinny Senzz? They are on sale on Albee for $149. May be a little heavier and wider than she is looking for, but ticks most of the other boxes except the cupholder. Not umbrella, but a small fold. SQ reviewed it--very full featured for $149 (original price over $400).
http://strollerqueenreviews.blogspot...zz-review.html
ETA: I've only seen 1 Senzz in person and it definitely looks nicer IRL than in pictures.
M, Mom to 3 handsome boys, '06, '08, '11