Congrats on your new Vac. I have a 51 that I like very much - from a performance perspective, damn near perfect! However, aesthetically, I prefer the vacs. Even so, I'm deliberately ignoring them (for now) as I know that once I dip my toe in that pool, I will fall in and drown! To adopt the old Lays potato chip slogan: "Bet you can't eat just one!'
Manhattans are beautiful (but perhaps a bit north of your budget - unless it's double coupon day ;-). They are in the same family as the Voyager - same shape and size I believe. Most Viscontis (with gold nibs) are pricey and it may be difficult to stay within your budget. You could probably find a reasonably priced Opera Club (same general shape as a Wall Street - size may be different, but I'm not certain of that). However, you can get a Rembrandt that is quite reasonably priced (although it has a steel nib) if you want to test the waters to see if you like Visconti. I, personally, have never met a Visconti that I didn't like ;-) No affiliation with Visconti or any sellers BTW. Enjoy your search!