3+/4 Season Tent Options - Solo Hiker

Long story short, had a SD Omega convertible which was an excellent tent. But as my BP'ing buddies started bowing out of winter overnights and left me to my own devices, tent was way too heavy and big for solo backpack's. Moved on to Black Diamond FirstLight. Super light and super small BUT if the conditions ***are not absolutely perfect***, you will have a bad night in shoulder season and a dangerous night in the winter as the tent will be wet from the inside and out (fool me once, shame on me, fool me about 4-5 times, shame on you, tent).

Do not want to (read: I can't) spend $600ish+ it seems to cost for a new 1-person 4-season (e.g., MSR Access 1). Thinking my 3-season one person tent (EMS, 1-center-pole, 2 hubs, peak pole, sturdy, good in wind, good ventilation and big vestibule) can work?

Other ideas? I'm not a bivy guy, too confining. Also not a tarp guy, like to be "in" something. We've all been in a 3-season in basically winter conditions, so that's where I'm leaning unless I hear some other good ideas.

Use: Think pitching at the Perch, Garfield, Liberty etc. anytime from October to April. Winter overnight trips are usually mid-Feb to mid-March when light is more abundant. Near treeline, usually not above unless pretty mellow. Also do winter overnights b/c I want to, not b/c I have to so a really bad forecast pushes the trip off. Mountains will still be there next weekend. Have a -20 down bag but sleep on the cold side.

THANKS!