Depends on the mouse and model. Some of the generic or
off-brands are still fairly low resolution but modern
Logitech and MS are better, in the low end, and
significantly better in the middle to higher end. The two
models I mentioned previously are both good options, unless
you wanted to go cordless too.
IIRC your current mouse is 400DPI, even the 2-4 generations
old Logitech X2, MX300, MX310, and slightly newer like
RX300, etc. Some like the RX300 are OEM and so not listed
on this page (but might be on an OEM section of their
'site).
http://www.logitech.com/index.cfm/mice_pointers/mice/&cl=us,en&page=0&filter=0&sort=0
I'm sure MS makes several as well but overall I find their
quality lower and therefore am not as familiar with their
ambi offerings, but they do include the Habu Laser Gaming
Mouse (based on pictures, I've not seen one in person),
Even some cheap generic mice now have at least double the
resolution, for example,
http://www.newegg.com/Product/Product.aspx?Item=N82E16826193001
but personally I'd not get one that cheap, rather sticking
with the major brands. IE - Logitech or MS
In Logitech's lower-end, the SBF-90 & SBF-96, I think are
both still 400DPI and equivalent to what you have. Their
next higher priced B58 or BT-58 should be 800DPI (red LED
type),
http://www.newegg.com/Product/Product.aspx?Item=N82E16826104157
http://www.newegg.com/Product/Product.aspx?Item=N82E16826104036
Best bang for the buck in an corded USB laser (if you like
the shape, it is worthwhile to go to a store to try a few)
might be the RX1000,
http://www.newegg.com/Product/Product.aspx?Item=N82E16826104014
given it's price it makes it a bit silly how much more the
G3 costs, but the G3 might have a slightly faster sensor or
something most applicable to high speed gaming movements.
Beware of some of Logitech's 1000DPI using an "invisible
light" lighting/sensor technology (LX5, LX7, the V200
notebook mice and a few others) as they only work well on an
optimal mousing surface, otherwise they may be no better or
even worse than the 800DPI red LED types and always worse
than the lasers (but the technology does allow for longest
battery life in a cordless version).
More Logitech Mice @ Newegg
http://www.newegg.com/Product/Produ...&Subcategory=65&description=&Ntk=&srchInDesc=
Another ambi laser is in Logitech's LX710 cordless Kbd/Mouse
set. A bit pricey normally but it frequently has rebates to
bring it down around $40 AR, but presently I don't know if
it's on or off a rebate period.