MIDI keyboard advice please

[Dankology]

On a whim, I've picked up the Behringer Solina recreation and I'd like to use it at gigs, using a cheap(ish) MIDI keyboard.

 

I've currently got an old Novation Remote SL25, which is a bit too small (ideally want 3 octaves) and a Kawai electric piano (which isn't portable).

 

I'm looking for a 37 key keyboard and I think it will need to have a traditional 5-pin MIDI output.

 

The Solina has a 5-pin and a USB-B, the Kawai just has USB-B, the Novation has both but the 5-pin seems to be disabled when it's powered via the USB port... I'm also led to believe that connecting two USB-B ports together doesn't work.

 

The module only arrived today so I've just been testing it out by plugging the keyboards and the Behringer itself into a laptop but this is causing terrible lag between hitting a note and the sound emerging (which doesn't happen when using the same keyboards via USB to trigger soft synths.

 

So... am I looking for what appears to be a rare thing (a reasonably priced 37-key keyboard with 5-pin port) or is there some way of connecting two USB ports together without a laptop that will allow for latency-free live use?

 

This is fairly new ground to me so please speak slowly and imagine you were speaking to someone far more at home twanging wires stretched over planks of wood.

[TheLowDown]

There's plenty to choose from, but it depends what you mean by reasonably priced. Maybe Akai mini plus?

 

If you want to connect using USB  then you'll need a MIDI host which is kinda like an adaptor.

Edited 2 minutes ago by TheLowDown

[BassTractor]

IF you can stretch this to 49 keys, the simple Midiplus AK490 spawns enormous quality and playability for the money. Expect to have to search, though Bax seem able to deliver next week. 5-pin DIN.
IMS, it spawns a battery compartment, which in case I've used extensively.

Maybe obsolete, the M-Audio Keystation 37 is a bit more spongy in its keys' response, but still quite alright. 5-pin DIN

I've recently also bought an Icon iKeyboard 4S (three octaves, not four, so 37 keys), which surprised me positively to the degree I'll go for Icon from here despite its higher price point. 5-pin DIN.
Icon has cheaper models too: the iKeyboard 4 and iKeyboard 4X, which I feel still are impressive for the money. 
Sadly, Icon make things a bit complicated with the enormous range they offer. They offer three different key sizes (regular, mini and nano), lengths from 25 to 88 keys, and also different levels of being advanced and knobby. If you can, visit a shop and compare them. Be aware that the more knobby models have better keybeds, and sometimes the longer models spawn better keybeds too.

I'm not too knowledgeable about USB stuff, and know zilch about the disabling you mentioned, so can't help there.