Getting a bike that fits makes riding MUCH less tedious.

"......as I do like to do speed runs on the road......"
"......currently I don't ride much at all, maybe 2-3 times this year....."

That kind of sends a mixed message-

You might describe your size and maybe one of us can help pick a bike on CL.

IF you are tall, this would be a good candidate, since it's old enough that Schwinn hadn't gone to crap yet.
Schwinn High Sierra

Stay away from any suspension unless you absolutely need it, which you apparently don't.