Best IOS version for 3750 switch

I have just received 2 3750 switches, but both have a different IOS version.
One has -> IOS version 12.1(19)EA1d
and the other has -> IOS version 12.2(25)SEB2.
I just want to use the switches as Gb collectors for a serverfarm seperatly (so no stack configuration) with a redundant uplink to my distribution layer.
Can someone advise my which IOS is the best for my network?
Thanx, Marty

Switch 1:
Cisco Internetwork Operating System Software
IOS (tm) C3750 Software (C3750-I5-M), Version 12.1(19)EA1d, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2004 by cisco Systems, Inc.
Compiled Mon 05-Apr-04 22:06 by antonino
Image text-base: 0x00003000, data-base: 0x009206D8
ROM: Bootstrap program is C3750 boot loader
BOOTLDR: C3750 Boot Loader (C3750-HBOOT-M) Version 12.1(14r)EA1a, RELEASE SOFTWARE (fc1)
2224-3750-037000137 uptime is 23 hours, 52 minutes
System returned to ROM by power-on
System restarted at 09:02:42 GMT Thu Aug 11 2005
System image file is "flash:c3750-i5-mz.121-19.EA1d/c3750-i5-mz.121-19.EA1d.bin"
cisco WS-C3750G-24TS (PowerPC405) processor (revision H0) with 118776K/12288K bytes of memory.
Processor board ID CAT0904X00B
Last reset from power-on
Bridging software.
1 Virtual Ethernet/IEEE 802.3 interface(s)
28 Gigabit Ethernet/IEEE 802.3 interface(s)
The password-recovery mechanism is enabled.
512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address : 00:13:1A:65:50:00
Motherboard assembly number : 73-7058-12
Power supply part number : 341-0045-01
Motherboard serial number : CAT090400A0
Power supply serial number : LIT09020266
Model revision number : H0
Motherboard revision number : A0
Model number : WS-C3750G-24TS-E
System serial number : CAT0904X00B
Hardware Board Revision Number : 0x09
Switch Ports Model SW Version SW Image
* 1 28 WS-C3750G-24TS 12.1(19)EA1d C3750-I5-M
Configuration register is 0xF
Switch 2:
Cisco IOS Software, C3750 Software (C3750-IPSERVICES-M), Version 12.2(25)SEB2, RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2005 by Cisco Systems, Inc.
Compiled Wed 08-Jun-05 01:19 by yenanh
ROM: Bootstrap program is C3750 boot loader
BOOTLDR: C3750 Boot Loader (C3750-HBOOT-M) Version 12.1(14r)EA1a, RELEASE SOFTWARE (fc1)
2224-3750-037000138 uptime is 59 minutes
System returned to ROM by power-on
System image file is "flash:c3750-ipservices-mz.122-25.SEB2/c3750-ipservices-mz.122-25.SEB2.bin"
cisco WS-C3750G-24TS (PowerPC405) processor (revision L0) with 118784K/12280K bytes of memory.
Processor board ID CAT0925Z0WZ
Last reset from power-on
1 Virtual Ethernet interface
28 Gigabit Ethernet interfaces
The password-recovery mechanism is enabled.
512K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address : 00:14:A8:71:CA:00
Motherboard assembly number : 73-7058-13
Power supply part number : 341-0045-01
Motherboard serial number : CAT09251J90
Power supply serial number : PHI09220165
Model revision number : L0
Motherboard revision number : A0
Model number : WS-C3750G-24TS-E
System serial number : CAT0925Z0WZ
Hardware Board Revision Number : 0x09
Switch Ports Model SW Version SW Image
* 1 28 WS-C3750G-24TS 12.2(25)SEB2 C3750-IPSERVICES-M
Configuration register is 0xF

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