What is and is not concealable tends to vary, some people claim they can only carry little .25's, others will do what it takes to carry a 1911 GM. Your Kahr is one of the best carry guns around, so I'm offering picks of all sizes. You should buy something that fits your hand, then worry where to hide it. Stretch your budget by buying from out of state dealer and finding a ffl to do the transfer. You can save $75 to $100, more if your local shops are rip of joints.
Some suggestions, and recent sale prices (some may not be in stock) CDNN is not Canadian $. All the prices are less shipping and dealer transfer fees. Not an offer to sell. If you want prices on anything else, or variant not listed, just ask.
Beretta 92d Compact Type L 499.99 (CDNN)
Longish trigger reach
Browning Hi Power Chrome 599.99-550.00 (CDNN)- GLP14
Exceeds Budget
KelTec p11 Chrome 199.99 (CDNN)
Small, light, redundant since you have a Kahr
HK USP Fullsized stainless 599.99 (CDNN)
Trigger reach/Price but you get a lot for your money
Sig 228 DAO 489.99 (CDNN)
Compact,Meets your needs very well, optional short trigger, would be my choice
HK USP 40 used 399.99 (CDNN)
.40 and large,but what a deal!
Steyr Model M 299.99 (CDNN)
No comment
Springfield XD 365.15+
5" 4" 3" all list same price, seems to be very popular, looking into one myself
Sig 220 9mm $469.00 (SOG)
Single stack, slim grip, large
S&W 6946 259.95 used (SOG)
DAO,I hate buying used Al frame guns extra 12 rnd mags are cheap
S&W 6906 used 289.99 KY
DA/SA, see above
SIG 226 used 389.99
I hate buying used Al frame guns
S&W 5906 449.99 CDNN
Heavy
Walther P99/P99 QA
Grip is adaptable to people with smaller hands, has weird manual of arms.
Beretta 92 compact Type M
Single stack
High Power Clone $250+
Needs a trip to gunsmith to clean up rough spots
CZ 75 $325+
A true bargin, seems to fit lots of people
Ruger 9mm's $275+
Not pretty but reliable
Kahr T9
Didn't bother to look up price as it is way over budget
HK P7M8 used 699.95
Over budget, probably a 20yo jersey state trooper gun, but a cult classic
Dave