Two of my favorite most carried EDC with 3" blade lengths have button locks: Olson Quick Flick and William Henry B12 Atlas.
I have three large folders with button locks and aluminum handles.
My favorite is the Spartan Pallas. It's the most comfortable, lightest, best steel and both flipper and thumb stud opening.
Both ProTech TR-4MA.1 and Hogue EX-01 (34150) are about $100 less than the Pallas and more than enough for most people!
[table="width: 500, class: grid"]
[tr]
[td][/td]
[td]
ProTech TR-4MA.1[/td]
[td]
Hogue EX-01 (34150)[/td]
[td]
Spartan Pallas[/td]
[/tr]
[tr]
[td]Blade Steel[/td]
[td]154CM[/td]
[td]154CM[/td]
[td]S35VN[/td]
[/tr]
[tr]
[td]Blade Length[/td]
[td]4.00"[/td]
[td]4.00"[/td]
[td]3.75"[/td]
[/tr]
[tr]
[td]Blade Thickness[/td]
[td]0.125"[/td]
[td]0.15"[/td]
[td]0.153"[/td]
[/tr]
[tr]
[td]Overall Length[/td]
[td]9.25"[/td]
[td]8.875"[/td]
[td]8.75"[/td]
[/tr]
[tr]
[td]Handle Material[/td]
[td]Aluminum[/td]
[td]Aluminum[/td]
[td]Aluminum[/td]
[/tr]
[tr]
[td]Handle Length[/td]
[td]5.25"[/td]
[td]4.875"[/td]
[td]5.00"[/td]
[/tr]
[tr]
[td]Weight[/td]
[td]5.50 oz.[/td]
[td]5.60 oz.[/td]
[td]4.74 oz.[/td]
[/tr]
[tr]
[td]MSRP[/td]
[td]$280[/td]
[td]$220[/td]
[td]$285[/td]
[/tr]
[tr]
[td]Street Price[/td]
[td]$186[/td]
[td]$187[/td]
[td]$285[/td]
[/tr]
[/table]