Focusrite has a grainy signature Focusrite sort of sound that some people speak very highly of.
It's even more obvious with their expensive all discrete transformer based stuff because then when you compare within the higher price points it is very easy to hear how stressed and grainy the mid range sounds compared to deluxe sounding gear.
That might be ok for a trumpet... if you want it to sound aggressive perhaps even irritating.
It's my impression that low priced Focusrite grainy sounding stuff sounds ok when you compare to all the other generic stuff that sounds grainy.
Shopping for a device with good drivers is the way to go if you are sticking with a lower price point.
Sending a trumpet to a generic iChip is going to be an exercise in compromise.
It will be a lot more fun if the drivers are best in class and you can focus on getting the best sound with what you end up with.
RME and Motu have the best Win drivers.
The Roland stuff has great drivers but poor grounding on the appliances so they seem to have noise issues.
Who else makes great drivers?
best regards,
mike