I thought my mufflers needed to be repacked, as they were insanely loud, like have to ride with ear plugs loud. Just buttoned them up with new packing inside and they are still just as loud. Is this just how they are?

Yes.

Get some DB killers for that model.

Sil Moto (or formerly Silmotor from back in the day) have always been traditionally barky and loud...just is how they are...

No, but i want them sooo bad. sooo purty......

My 620 had Sil highmounts and they were pretty healthy. I'd say on par with my 900.

On the ear plugs - you should use them regardless of the exhaust. Just the constant wind noise on a quiet bike can slowly damage your hearing. And there's studies indicating that plugs lead to reduced fatigue over time when in a high noise environment ie riding a bike