My older brother has the L100t2 and IMO, they are a case of "if it isn't broken, don't fix it" category. His are for 100% music and would be hard to beat without spending a considerable amount of $. They do well with pretty much all popular music without being overly revealing or harsh. I definitely would not trade them for anything made (way overpriced) these days that mount on a stand, for instance. He had to replace the surrounds about 10 years ago or so and they are still as formidable as ever.
I have three different pairs of JBL from the budget S series from the late '90s/Y2k-ish era and I use them because they are good enough (excellent, really) without being too finnicky, while so many of the trendy, overpriced boutique brands are a bit too 'pinkies up' cork-sniffing appeal for my use.
In other words, don't let upgraditus from internet window shopping and starving reviewers kick those old JBLs to the curb if they are still working well.